Biogen Support

Support you may need

Whether you've recently been diagnosed with relapsing multiple sclerosis (MS), or you're caring for someone with MS, you're not alone. From financial assistance to nurse educator support, we can help make things a little easier, as long as you need it.

Paying for TECFIDERA

Find out about the support you can receive to help pay for TECFIDERA. More

Nurse Educators and Community Support

Learn about ActiveNursesTM and ActiveVoicesTM. More

Find Events

See where a relapsing MS event might be happening near you. They are taking place all over the US and live online. More

$0 Copay Program from Biogen

Sign up for TECFIDERA ActiveAccess and find out about the $0 Copay Program from Biogen. Focus on your treatment, not on the costs.

Learn more

Get a TECFIDERA brochure

Take another look at relapsing MS. Request this brochure to learn more about TECFIDERA.

Request a brochure

Access the Patient Support Call Center

Call 1-800-456-2255 to speak with a nurse educator and find support when you need it.

Learn more about this service

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Tecfidera® (dimethyl fumarate) is a prescription medicine used to treat people with relapsing forms of multiple sclerosis.

Important Safety Information

Important Safety Information and Indication

Do not use TECFIDERA if you have had an allergic reaction (such as welts, hives, swelling of the face, lips, mouth or tongue, or difficulty breathing) to TECFIDERA or any of its ingredients.

Before taking and while you take TECFIDERA, tell your doctor about any low white blood cell counts or infections or any other medical conditions.

What are the possible side effects of TECFIDERA?

What are the possible side effects of TECFIDERA?

TECFIDERA may cause serious side effects including allergic reactions, PML, which is a rare brain infection that usually leads to death or severe disability, and decreases in your white blood cell count. Your doctor may check your white blood cell count before you take TECFIDERA and from time to time during treatment.

The most common side effects of TECFIDERA include flushing and stomach problems. These can happen especially at the start of treatment and may decrease over time. Taking TECFIDERA with food may help reduce flushing. Call your doctor if these symptoms bother you or do not go away. Ask your doctor if taking aspirin before taking TECFIDERA may reduce flushing.

These are not all the possible side effects of TECFIDERA. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. For more information go to

Tell your doctor if you are pregnant or plan to become pregnant, or breastfeeding or plan to breastfeed. It is not known if TECFIDERA will harm your unborn baby or if it passes into your breast milk. Also tell your doctor if you are taking prescription or over-the-counter medicines, vitamins, or herbal supplements.

For additional important safety information, please see full Prescribing Information and Patient Information. This is not intended to replace discussions with your doctor.